Fluid-pressure brake device.



E. A. EMBRY.

FLUID PRESSURE BRAKE DEvIoE.

APPLICATION FILED MAB. 31, 1910.

Patented Sept. 26, 191,1.

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WITN ESSES UNITED STATES PATENT OFFICE.

EDWIN A. EMERY, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE EMERY PNEUMATICLUBRICAIOR COMPANY, A CORPORATION 0F COLORADO.

FLUID-PRESSURE BRAKE DEVICE.

Specification of Letters Patent.

Patented Sept. 26, 1911.

Application filed March 31, 1910. Serial No. 552,678.

To all 'whom t may concern:

Be it known that I, EDWIN A. EMERY, a citizen of the United States,residing at St. Louis, in the State of Missouri, have invented new anduseful Improvements in Fluid- Pressure Brake Devices, of which thefollowing is a specification.

This invention relates to fluid pressure brakes, and more particularlyto means for lubricating the brake cylinder and 'for maintaining thesame free from dirt and foreign matter.

It has heretofore been proposed to conduct the exhaust air from thebrake cylinder in releasing the brakes to the chamber at thenon-pressure side of the brake piston, so that instead of sucking in thedust laden air around the piston stem as the brake piston moves torelease position, the

`exhaust air, being admitted to the non-pressure piston chamber, blowsout and thereby prevents the entrance of dust and dirt from the externalair. Furthermore, this venting of air to the non-pressure side of thebrake piston aids in releasing the brakes, as will be apparent.

Accordingly, one object of my invention is to provide improved means forventing exhaust air from theV brake cylinder to the chamber at thenon-pressure side of the brake piston.

Another object of my improvement contemplates utilizing the exhaust airvented to the non-pressure side of the brake piston as a medium forlubricating t-he brake cylinder. By this means, the brake cylinder wallsmay be thoroughly lubricated while excluding dirt from the brakecylinder and furthermore, rusting of the Walls of the brake cylinder isprevented.

In the accompanying drawing; Figure l is a diagrammatic View of anautomatic brake equipment for a oar, embodying one form of myimprovement; Fig. 2 a similar `view of a straight air brake equipmentfor a car, with my invention applied thereto; Fig. 3 a central sectionalview of a brake cylinder constructed in accordance with my invention;and Fig. l a section on the line a-a of Fig. 3.

According to Fig. l of the drawing, my improvement is Shown applied toan automatic brake equipment on a motor car, comprising the usual trainpipe 1, engineers brake valve 2, main reservoir 3, triple valve device4, connected to the train pipe 1 by a branch pipe 5, auxiliary reservoir6, and brake cylinder 7.

In the branch pipe 5 is located a lubricator 8, preferably of the typein which the lubricant is dissolved by a current of compressed air andis then conveyed by said current to the parts to be lubricated, and ascovered in my prior Patent No. 827,519 of July 31, 1906.

A pipe 9 is connected to the exhaust port of the triple valve 4 andleads to a passage 10 in the non-pressure head 11 of the brake cylinder7. As shown in Figs. 3 and 4, this passage 10 may have two branches 13and lll, opening into the non-pressure chamber 12 of the brake cylinderat diametrically opposite points. The nozzle outlets 15 and 16 of therespective branch passages 13 and 14 are so disposed that the current ofair is directed to the inner walls of the brake cylinder spirally, oneupwardly and the other downwardly, so that the air is caused to swirlaround the walls of the brake cylinder. Thus the air carrying thelubricant is evenly distributed on the brake cylinder walls and thethorough lubrication of the brake cylinder is assured.

It will now be evident that the exhaust fluid from the brake cylinder,flowing through pipe 9 from the triple valve exhaust port will sweeparound on the inner walls of the brake cylinder and thereby clean offany particles of dirt which may adhere to the walls, the air finallyescaping to the atmosphere around the brake piston stem. The lubricantcharged into the air by the action of the lubricator 8 is also carriedto the walls of the brake cylinder and by reason of the above describedswirling action of the air thoroughly lubricates the walls of the brakecylinder. Vhile lubrication of the cylinder walls could be effected tosome extent regardless of the particular manner in which the air isadmitted to the brake cylinder non-pressure head, a more effectivelubrication is secured by arranging the outlet nozzles 15 and 16 ashereinbefore described.

In Fig. 2 is illustrated a straight air brake equipment comprising astraight air brake valve 17 main reservoir 18, and straight air pipe 19,connected to the brake cylinder 20. In this` case a lubricator 21 isshown interposed in the supply pipe 22 leading from in the non-pressurehead of the straight air brake cylinder 20 as hereinbefore described inconnection With Fig. l, and it Will be evident that the operation is thesame, the

lubricant in the air as supplied from the lubricator' 21 being conveyedwith the exhaust from the brake cylinder to the nonpressure chamber ofthe brake cylinder.

Having now described my invention, vvhat I claim as new and desire tosecure by Let' ters Patent, is

1. In a fluid pressure brake, the combination with a brake cylinder andmeans for charging the air in the brake system With a lubricant, ofmeans for conveying the exhaust air from the brake cylinder to thechamber at the non-pressure side of the brake pist-on.

2. In a fluid pressure brake, the combination with a brake cylinder anda lubricator device for charging the air in the brake system With alubricant, of means for discharging air in releasing` the brakes to thechamber at the non-.pressure side of the brake piston.

3. In a fluid pressure brake, the combination vvith a brake cylinder,train pipe, and triple valve, of a lubricator device for charging thefluid in the brake system with a lubricant and means for connecting` theexhaust port of the triple valve to the nonpressure chamber of the brakecylinder, to thereby lubricate the brakey cylinder by means of theexhaust air from the brake cylinder and also preventthe entrance ofdirt.

et. In a fluid pressure brake, the combina tion With a bralzeeylinder,train pipe, and triple valve, of a lubricator device forA charging thefluid in the train pipe With a lubricant and a pipe connecting theexhaust port of the triple valve t0 the chamber at the nonpressure sideof the brake cylinder piston, to thereby vent the lubricant laden airreleased from the brake cylinder t0 said nonpressure chamber.

5. In a fluid pressure brake, the combination with a brake cylinder, ofmeans for conveying` the exhaust air from the brake cylinder to thechamber at the non-pressure side of the brake piston, said means beingadapted to discharge the air onto the brake cylinder Walls in a spiraldirection, to thereby elIect a swirling action of the air.

6. In a fluid pressure brake, the combination with a brake cylinder, ofmeans for conveying the exhaust air from the brake cylinder to thechamber at the non-pressure side of the brake piston, said means havingoppositely varranged outlets adapted to discharge air onto the brakecylinder Walls in opposite spiral directions.

7. In a fluid pressure brake, the combination With a brake cylinder anda lubricator device for charging the air in the brake system With alubricant, of means for conveying the exhaust air from the brakecylinder to the chamber at the non-pressure side of the brake cylinder,said means being adapted to discharge the air onto the brake cylinderWalls in a spiral direction to thereby thoroughly lubricate the brakecylinder Walls by the swirling action of the air.

ED`WIN A. EMERY.

Witnesses WVM. M. CODY, A. M. CLEMENTS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

